It's quite some time since the last update about my awesome FIDO2 Authenticator project [/category/fido2/]. The project did not stop, no. The latest challenging point was the idea that I should not use the external biometric scanner with UART interface but make a built-in one. So, I have ordered a few more biometric scanner modules and, unfortunately, it took several weeks to deliver.
Recently I've started connecting FPC1020A Fingerprint scanners [/2019/12/03/fpc1020-fingerprint-scanner/] to ESP32 microcontroller and built a working test board for both modifications I have.
After some disruption on hardware design, I have returned to writing driver for the FPC1020 fingerprint scanner [/2019/12/03/fpc1020-fingerprint-scanner/]. It's sad, but as I don't have complete documentation the process takes a significant amount of time and a lot of effort. To speed up the evaluation I started to write relevant code using C++ and Arduino Framework.